Hand-brake.



N. KROHN.

HAND BRAKE.

APPLICATION FILED m4. :6. m4.

Patmwdmr. 12, 1918.

a SHEETS-S HEET I WWW N. KROHN.

HAND BRAKE.

APPLICA'HON FILED Jim-2s. 1914.

Patented Mar. 12, 1918.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

NELS KROHN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE ADAMS & WESTLAKE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION ILLINOIS.

HAND-BRAKE.

Application filed January 26, 1914.

To all whom it may concern Be it known. that I, Nnns T{ROIIN, a citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvments in Hand-Brakes, of which the following is a specification, and which are .illustrated in the accompanying drawings, forming a part thereof.

The invention relates to hand brakes for railway cars, of the type used on vestibuled cars.

The object of the invention is to provide a compact, durable and etlicient construction of mechanism by which rotary motion is communicated to the brake shaft by means of an oscillating handle.

An embodiment of the invention is fully hereinafter described, and is illustrated in the accompanying drawings, in which- Figure 1 is a detail plan view of the head of the brake shaft;

Fig. 2 is a detail sectional view on the line 22 of Fig. 1;

Fig. 3 is an inverted view of a cap piece forming a part of the mechanism;

Fig. 4 is a view in perspective of a movable ratchet block;

Fig. 5 is a plan view of the same;

Fig. 6 is a plan view of the journal bracket for the brake shaft; and

Fig. 7 is a detail side elevation of the same.

The brake shaft is represented at 10, its upper end being journaled in a box 11 forming a part of a bracket 12 adapted to be fixed to a part of the car. A circular block 13 is mounted upon the shaft 10 immediately above the box 11, and is secured to the shaft by means of a pin 14. This block is provided on its upper face with an annular series of ratchet teeth 15.

A cooperating ratchet block 16, having teeth 17 on its lower face, is loosely mounted on the shaft 10 above the block 13, being free to turn and slide axially upon the shaft.

A cap 18 is fitted over the upper end of the shaft 10, and is keyed thereto by means of pins 19, 20, fitting within an annular groove 21 in the shaft, thereby permitting the rotation of the cap relatively to the shaft while preventing axial movement.

The cap 18 incloses the ratchet block 16, and the latter is locked to the cap against rotary movement. by means of upstanding Specification of Letters Patent.

Patented Mar. 12, 1918.

Serial No. 314,475.

lugs 23, on the block, entering complementary recesses 21, :25, in the cap. The lugs 23, are, however, of less length axially than the depth of the recesses Within which they fit, thereby permitting vertical play of the block 16 to permit the disengagement of it teeth from the teeth of the block 13. A spring 26, coiled about the upper end of the shaft 10, reacts between a shoulder 27 adjacent the top of the cap 18 and the block 16, normally holding the latter in engagement with the blOCK 13.

A handle 28 is pivoted between a pair of outstanding lugs 29, 30, formed on the cap 18, and provides for the oscillation of the cap about the brake shaft, and, when not in use, hangs vertically.

An annular upstanding flange 31 is car ried by the box 11, incloses the ratchet block 13, and fits within the cap 18. Upon the upper edge of the flange 31 there are provided cam and stop lugs 32, 33, these lugs being inclined in one direction, as shown at 3-1, and having abrupt faces oppositely directed, as shown at 35. At its summit each of these lugs is provided with a notch or recess 36, and a stop shoulder 37 facing in the direction of the incline 34.

The cam block 16 is provided with radiating lugs 38. 39, which ride upon the rim of the flange 31 and engage the lugs 32. The parts are so arranged relatively that when the handle 23 is moved in a direction to wind up the brake chain (not shown) upon the shaft 10, the ratchet blocks interlock. The forward movement of the hand lever is limited by the engagement of the lugs 38, 39, with the shoulder 35. Upon the return movement of the hand lever these lugs mount the cams 34, thereby lifting the upper ratchet out of the lower one and leaving the shaft free to turn independently of the hand lever. The lugs 38, 39, come to rest in the recesses 36, and the hand lever is thereby held against accidental movement.

The cap 18 form an inclosure and protection for all of the operating mechanism, giving the device a neat appearance; preventing aecidental injury to an operators hands by the movable parts, and excluding dust and dirt.

I claim as my invention- 1. In a hand brake, in combination, a fixed bracket having a journal box provided with an upstanding annular flange having upstanding lugs forming in one direction lifting cams terminating in retaining recesses and forming stops in the opposite direction, a shaft journaled in the box, a block fixed to the shaft and having ratchet teeth on its upper face and being inclosed Within the upstanding flange, a cooperating ratchet block loose on the shaft and having radial arms in the path of the lugs, and means for turning the cooperating ratchet block about its axis.

2. In a hand brake, in combination, a fixed bracket having a journal box provided With an upstanding annular flange having upstanding lugs formed in one direction into lifting cams terminating in retaining recessesand forming stops in the opposite direction a shaft journaled in the box, a block against axial movement, such cap inclosing the upstandlng flange and havlng radial pockets, lugs on the cooperating cam cntermo; such pockets, and movable axially there- 1n, and a handle for turning the cap.

NELS KROHN.

Witnesses:

G. L. WALTERs, WM. S. HAMM.

Copies of this patent may be obtained for five cents each. by addressing the Commissioner of Patents,

Washington, D. 0. 

